Kyle was killed with a . ... Kyle and Littlefield had reportedly taken Routh to the gun range in an effort to help him with his post-traumatic stress disorder (PTSD). Routh had been in and out of mental hospitals for at least two years and had been diagnosed with schizophrenia.

Why Kyle was killed?

Following this point, Gale became Walt's lab assistant. ... However, in a desperate attempt to save their lives, Walt orders Jesse to murder Gale in order for them to be the only meth cooks capable of producing "Blue Sky" available to Fring, which Jesse reluctantly did by shooting Gale in the face.

Did Eddie Ray Routh get the death penalty?

A Texas jury has found Eddie Ray Routh guilty of the murder of US Navy Seal Chris Kyle, who wrote American Sniper, and his friend Chad Littlefield. The judge sentenced Routh to life in prison without parole; prosecutors had not sought the death penalty.